Can I bring my own SSL certificate?

Yes, you can bring your own SSL certificate through your own issuing authority.

SSL certificates are reissued yearly. If you obtain an SSL certificate through your own issuing authority, you'll be responsible for renewing the SSL certificate with the issuing authority. If the SSL certificate is not renewed and installed on the server before the expiration date, the lapsed SSL certificate may cause the website to issue warnings to visitors or the website will not render.